ACPICA: Update copyright year

ACPICA commit 45253be18b3f37d46cd0072aa3f8a0a21a70e0a4

Changes needed by acpisrc to update copyright year when building for
release.

Link: https://github.com/acpica/acpica/commit/45253be1


Signed-off-by: Saket Dumbre <saket.dumbre@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>